The perimeter of the rectangle is 52 cm, its length is 17 cm. What is the width of this rectangle.

The perimeter of a rectangle is the sum of its length and width times two.
The first way to solve the problem.
one). Find what the width of the rectangle is.
(52 – 17 * 2) / 2 = (52 -34) / 2 = 18/2 = 9 cm.
Answer: The width of the rectangle is 9 centimeters.

Second way.
We will solve the problem using an equation with one unknown.
one). The width of the rectangle is x cm.
2). Let’s compose and solve the equation.
(x + 17) * 2 = 52;
2x + 34 = 52;
2x = 52 – 34;
2x = 18;
x = 18/2 = 9;
x = 9;
Answer: The width of the rectangle is x = 9 centimeters.